EP1412641B1 - Ventilation unit - Google Patents
Ventilation unit Download PDFInfo
- Publication number
- EP1412641B1 EP1412641B1 EP02790223A EP02790223A EP1412641B1 EP 1412641 B1 EP1412641 B1 EP 1412641B1 EP 02790223 A EP02790223 A EP 02790223A EP 02790223 A EP02790223 A EP 02790223A EP 1412641 B1 EP1412641 B1 EP 1412641B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ventilation unit
- central body
- annular wall
- blades
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Revoked
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
- F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
- F04D29/329—Details of the hub
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
Definitions
- the present invention relates to a ventilation unit, in particular, but not exclusively, for on-vehicle devices such as radiators, heat exchangers, etc.
- ventilation units substantially comprise a fan defined by a cup-shaped central body having a base wall and a cylindrical lateral wall, and by a number of blades extending substantially radially from the outer face of the lateral wall; and the central body is fitted to the output shaft of an electric motor housed at least partly in the central body.
- a ventilation unit is disclosed in US-A-5 193 981 .
- the ventilation unit may be installed inside or outside the vehicle, in which latter case, the through holes further endanger operation of the electric motor by also channeling rainwater towards it.
- a ventilation unit of the type comprising an electric motor, the output shaft of which is fitted with a fan having a cup-shaped central body and a number of blades; said central body being defined by a base wall, and by an annular wall from whose outer face said blades extend; and said ventilation unit being characterized in that at least one through window is formed in said annular wall to channel out, in use, any condensate formed inside said central body.
- number 1 indicates as a whole a ventilation unit installed at on-vehicle devices (not shown) such as radiators and heat exchangers, or at other temperature-regulating devices, and which, as is known, is substantially used to disperse into the environment the heat produced by such devices.
- on-vehicle devices such as radiators and heat exchangers, or at other temperature-regulating devices, and which, as is known, is substantially used to disperse into the environment the heat produced by such devices.
- Ventilation unit 1 comprises a frame 2 fitted integrally to a fixed structure (not shown) on the vehicle; a fan 3 installed inside frame 2; and an electric motor 4, the casing of which is integral with frame 2, and the output shaft 5 of which is fitted with fan 3.
- frame 2 comprises an annular wall 6; a central sleeve 7 coaxial with annular wall 6; and a number of equally spaced radial ribs 8 connecting the outer face of sleeve 7 to the inner face of annular wall 6. More specifically, sleeve 7 and ribs 8 are formed at an axial end edge of annular wall 6; in fact, almost the whole length of sleeve 7 extends axially outside the space enclosed by annular wall 6.
- fan 3 comprises a cup-shaped central body 11 coaxial with sleeve 7 and with annular wall 6 of frame 2, and which comprises a base wall 12, and an annular wall 13 extending from base wall 12 towards sleeve 7.
- Central body 11 and sleeve 7 have substantially the same inside diameter, and define a seat 14 ( Figure 2) for housing electric motor 4; and fan 3 also comprises a number of equally spaced blades 15 extending from the outer face of annular wall 13 towards the inner face of annular wall 6.
- electric motor 4 is installed inside a cylindrical casing 16 defined by an annular lateral wall 17 and by two axial end covers 18 and 21; casing 16 is fixed by screws 22 to sleeve 7; shaft 5 extends outwards of casing 16 through cover 21; and the axial end portion of shaft 5 is fitted with central body 11. More specifically, a through hole 23 is formed in the central portion of base wall 12, and is engaged integrally by said axial end portion of shaft 5; said central portion is thicker than the rest of base wall 12; and equally spaced reinforcing ribs 24 ( Figure 4) are formed between said central portion and the inner face of annular wall 13.
Abstract
Description
- The present invention relates to a ventilation unit, in particular, but not exclusively, for on-vehicle devices such as radiators, heat exchangers, etc.
- As is known, ventilation units substantially comprise a fan defined by a cup-shaped central body having a base wall and a cylindrical lateral wall, and by a number of blades extending substantially radially from the outer face of the lateral wall; and the central body is fitted to the output shaft of an electric motor housed at least partly in the central body. Such a ventilation unit is disclosed in
US-A-5 193 981 . - One of the main problems of ventilation units of the above type is the formation, inside the central body, of condensate which must be channeled out of the unit.
- At present, this is done by forming through holes in the base wall of the central body.
- In actual fact, however, the problem is only partly solved on account of most of the condensate, as opposed to being channeled out of the unit through the holes, being spun by the fan onto the inner face of the lateral wall of the central body. Most of the condensate therefore remains inside the central body and, when the fan is off, may flow towards the electric motor which, as is known, has metal parts and electric circuits which are easily damaged by contact with liquid and/or steam.
- Moreover, the ventilation unit may be installed inside or outside the vehicle, in which latter case, the through holes further endanger operation of the electric motor by also channeling rainwater towards it.
- It is therefore an object of the present invention to provide a ventilation unit designed to eliminate the aforementioned drawback by means of relatively straightforward, low-cost structural features.
- According to the present invention, there is provided a ventilation unit of the type comprising an electric motor, the output shaft of which is fitted with a fan having a cup-shaped central body and a number of blades; said central body being defined by a base wall, and by an annular wall from whose outer face said blades extend; and said ventilation unit being characterized in that at least one through window is formed in said annular wall to channel out, in use, any condensate formed inside said central body.
- A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
- Figure 1 shows a side view of a ventilation unit in accordance with the teachings of the present invention;
- Figure 2 shows a diametrical section of the Figure 1 ventilation unit;
- Figures 3 and 4 show a side view and plan view respectively of a fan of the Figure 1 ventilation unit.
- With reference to Figures 1 and 2, number 1 indicates as a whole a ventilation unit installed at on-vehicle devices (not shown) such as radiators and heat exchangers, or at other temperature-regulating devices, and which, as is known, is substantially used to disperse into the environment the heat produced by such devices.
- Ventilation unit 1 comprises a
frame 2 fitted integrally to a fixed structure (not shown) on the vehicle; afan 3 installed insideframe 2; and anelectric motor 4, the casing of which is integral withframe 2, and the output shaft 5 of which is fitted withfan 3. - With reference to Figures 1 and 2,
frame 2 comprises an annular wall 6; acentral sleeve 7 coaxial with annular wall 6; and a number of equally spacedradial ribs 8 connecting the outer face ofsleeve 7 to the inner face of annular wall 6. More specifically,sleeve 7 andribs 8 are formed at an axial end edge of annular wall 6; in fact, almost the whole length ofsleeve 7 extends axially outside the space enclosed by annular wall 6. - With reference to Figures 3 and 4,
fan 3 comprises a cup-shapedcentral body 11 coaxial withsleeve 7 and with annular wall 6 offrame 2, and which comprises abase wall 12, and anannular wall 13 extending frombase wall 12 towardssleeve 7.Central body 11 andsleeve 7 have substantially the same inside diameter, and define a seat 14 (Figure 2) for housingelectric motor 4; andfan 3 also comprises a number of equally spacedblades 15 extending from the outer face ofannular wall 13 towards the inner face of annular wall 6. - With reference to Figure 2,
electric motor 4 is installed inside acylindrical casing 16 defined by an annularlateral wall 17 and by twoaxial end covers casing 16 is fixed byscrews 22 tosleeve 7; shaft 5 extends outwards ofcasing 16 throughcover 21; and the axial end portion of shaft 5 is fitted withcentral body 11. More specifically, athrough hole 23 is formed in the central portion ofbase wall 12, and is engaged integrally by said axial end portion of shaft 5; said central portion is thicker than the rest ofbase wall 12; and equally spaced reinforcing ribs 24 (Figure 4) are formed between said central portion and the inner face ofannular wall 13. - With reference to Figures 2, 3 and 4, through
windows 25 are formed inannular wall 13 ofcentral body 11, close to the peripheral edge ofbase wall 12. In actual use, condensate is channeled out of ventilation unit 1 throughwindows 25, which are equally spaced and, in particular, each formed in the gap between twoadjacent blades 15. - The advantages of the present invention will be clear from the foregoing description.
- In particular, given the centrifugal force to which the condensate is subjected by rotation of
fan 3, formingwindows 25 inannular wall 13 provides for more effectively channeling the condensate outwards. Moreover, when installed outside the vehicle, ventilation unit 1 is protected against infiltration by rainwater, thus safeguardingelectric motor 4 against damage by water and/or steam, and so increasing the working life ofelectric motor 4, which in fact is the most expensive part of ventilation unit 1.
Claims (5)
- A ventilation unit (1) of the type comprising an electric motor (4), the output shaft (5) of which is fitted with a fan (3) having a cup-shaped central body (11) and a number of blades (15); said central body (11) being defined by a base wall (12), and by an annular wall (13) from whose outer face said blades (15) extend; and said ventilation unit (1) being characterized in that at least one through window (25) is formed in said annular wall (13) to channel out, in use, any condensate formed inside said central body (11).
- A ventilation unit (1) as claimed in Claim 1, characterized in that said through window (25) is formed close to the peripheral edge of said base wall (12).
- A ventilation unit (1) as claimed in Claim 1 and/or 2, characterized in that a number of said through windows (25) are formed in said annular wall (13).
- A ventilation unit (1) as claimed in Claim 3, characterized in that a number of equally spaced said through windows (25) are formed in said annular wall (13).
- A ventilation unit (1) as claimed in Claim 3 and/or 4, characterized in that said through windows (25) are each formed in the gap between two adjacent blades (15).
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITBO20010485 | 2001-07-27 | ||
IT2001BO000485A ITBO20010485A1 (en) | 2001-07-27 | 2001-07-27 | VENTILATION UNIT |
PCT/IT2002/000492 WO2003010438A1 (en) | 2001-07-27 | 2002-07-26 | Ventilation unit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1412641A1 EP1412641A1 (en) | 2004-04-28 |
EP1412641B1 true EP1412641B1 (en) | 2007-10-10 |
Family
ID=11439530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02790223A Revoked EP1412641B1 (en) | 2001-07-27 | 2002-07-26 | Ventilation unit |
Country Status (7)
Country | Link |
---|---|
US (2) | US20040265125A1 (en) |
EP (1) | EP1412641B1 (en) |
AT (1) | ATE375453T1 (en) |
DE (2) | DE20221940U1 (en) |
ES (1) | ES2295437T3 (en) |
IT (1) | ITBO20010485A1 (en) |
WO (1) | WO2003010438A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4259248B2 (en) * | 2003-09-19 | 2009-04-30 | 株式会社デンソー | Blower and heat exchange apparatus using the same. |
ITBO20040047A1 (en) | 2004-02-03 | 2004-05-03 | Spal Srl | AXIAL FAN |
TWI301175B (en) * | 2005-04-28 | 2008-09-21 | Delta Electronics Inc | Fan and it's impeller and housing |
TWI327453B (en) * | 2006-06-30 | 2010-07-11 | Delta Electronics Inc | Fan, motor and housing thereof |
WO2013060358A1 (en) * | 2011-10-25 | 2013-05-02 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Axial ventilator wheel |
JP5834342B2 (en) | 2011-12-12 | 2015-12-16 | 日本電産株式会社 | fan |
US11261876B2 (en) * | 2016-04-14 | 2022-03-01 | Parker-Hannifin Corporation | Fan with integrated shaft guard |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3303995A (en) * | 1964-09-08 | 1967-02-14 | Rotron Mfg Co | Fan motor cooling arrangement |
US3819294A (en) * | 1972-05-25 | 1974-06-25 | Carrier Corp | Fan construction |
US4150919A (en) * | 1977-06-10 | 1979-04-24 | Wallace Murray Corporation | Radiator cooling fan construction |
JPS5724499A (en) * | 1980-07-15 | 1982-02-09 | Matsushita Electric Works Ltd | Propeller fan |
JPS5865999A (en) * | 1981-10-12 | 1983-04-19 | Nissan Motor Co Ltd | Slant flow type fan |
US4583911A (en) * | 1983-10-24 | 1986-04-22 | Minnesota Mining And Manufacturing Company | Multiple fluid pathway energy converter |
IT8534930V0 (en) * | 1985-11-15 | 1985-11-15 | Spal Srl | LIMITED LONGITUDINAL AXIAL FAN, PARTICULARLY FOR VEHICLES |
US4838760A (en) * | 1987-04-27 | 1989-06-13 | Bendix Electronics Limited | Fan with motor cooling enhancement |
DE3941612C2 (en) * | 1989-12-16 | 1997-04-17 | Behr Gmbh & Co | Fan impeller made of plastic |
DE4102161A1 (en) * | 1991-01-25 | 1992-07-30 | Bosch Gmbh Robert | FAN WHEEL WITH A POT SHAPED HUB |
DE19513135A1 (en) * | 1995-04-07 | 1996-10-10 | Aeg Kleinmotoren Gmbh | Air vent for cooling condenser of vehicle air-conditioner |
-
2001
- 2001-07-27 IT IT2001BO000485A patent/ITBO20010485A1/en unknown
-
2002
- 2002-07-26 DE DE20221940U patent/DE20221940U1/en not_active Expired - Lifetime
- 2002-07-26 EP EP02790223A patent/EP1412641B1/en not_active Revoked
- 2002-07-26 DE DE60222905T patent/DE60222905T2/en not_active Expired - Lifetime
- 2002-07-26 WO PCT/IT2002/000492 patent/WO2003010438A1/en active IP Right Grant
- 2002-07-26 AT AT02790223T patent/ATE375453T1/en not_active IP Right Cessation
- 2002-07-26 ES ES02790223T patent/ES2295437T3/en not_active Expired - Lifetime
-
2004
- 2004-01-27 US US10/766,520 patent/US20040265125A1/en not_active Abandoned
-
2007
- 2007-08-17 US US11/889,905 patent/US7785069B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2003010438A1 (en) | 2003-02-06 |
ATE375453T1 (en) | 2007-10-15 |
US20080050231A1 (en) | 2008-02-28 |
DE60222905T2 (en) | 2008-07-24 |
ES2295437T3 (en) | 2008-04-16 |
EP1412641A1 (en) | 2004-04-28 |
ITBO20010485A1 (en) | 2003-01-27 |
DE20221940U1 (en) | 2009-09-03 |
US20040265125A1 (en) | 2004-12-30 |
DE60222905D1 (en) | 2007-11-22 |
US7785069B2 (en) | 2010-08-31 |
ITBO20010485A0 (en) | 2001-07-27 |
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